23212001 has 4 divisors (see below), whose sum is σ = 23472900. Its totient is φ = 22951104.

The previous prime is 23211997. The next prime is 23212009. The reversal of 23212001 is 10021232.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7845601 + 15366400 = 2801^2 + 3920^2 .

It is a cyclic number.

It is not a de Polignac number, because 23212001 - 2² = 23211997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23212009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130316 + ... + 130493.

It is an arithmetic number, because the mean of its divisors is an integer number (5868225).

Almost surely, 2^23212001 is an apocalyptic number.

It is an amenable number.

23212001 is a deficient number, since it is larger than the sum of its proper divisors (260899).

23212001 is an equidigital number, since it uses as much as digits as its factorization.

23212001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260898.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 23212001 is about 4817.8834564568. The cubic root of 23212001 is about 285.2577989507.

Adding to 23212001 its reverse (10021232), we get a palindrome (33233233).

The spelling of 23212001 in words is "twenty-three million, two hundred twelve thousand, one".